Graphics Programs Reference
In-Depth Information
If you have properly defined ink and paper in your Color Settings dialog box, you do not need to
change the Black Point values. If you are not sure where you are going to print, or if you are going to
use your image on screen, you can use the values in the next step of this exercise.
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Type
65
in the C (Cyan) text field,
53
in the M (Magenta) text field,
51
in the Y (Yellow) text box and
95
in the K (Black) text field. Click OK. A warning dialog box appears asking if you would like to save
the target values; click Yes.
It is important to note that your printer might be able to achieve a richer black than the one offered
here. If you have a relationship with a printer, ask for their maximum black value and enter it here.
Otherwise, use these standard values.
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Now, select the highlight slider ( ), and then press and hold Alt (Windows) or Option (Mac OS) and
slide it to the right. Notice that the image appears posterized: this is the automatic clipping that is vis-
ible when you press and hold the Alt/Option key. The clipping makes it easier to locate the darkest and
lightest areas of an image—an essential task if you are trying to improve an image's tonal values.
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In this example, the flames in the baseball hat are visible in the preview, indicating that the area is re-
cognized as one of the lightest parts of this image. If you are working on your own image and don't im-
mediately see the lightest part of the image, you can Alt/Option drag until a light part of your image is
highlighted. Notice that there are other light areas in this image, but you are focusing on the primary
subject, which is the boy.
Select the highlight slider.
Press and hold the Alt/Option key while positioning the cursor over the image.
If you are working on a different image, you might notice that there are some other light areas that ap-
pear that could be considered specular highlights. It helps to remember that if a light point appears that
belongs to something shiny, you should ignore it and drag the slider to the right until you find the first
legitimate (non-spectacular) highlight.
In the next step, you will mark this light area with a color sampler on the image. This way, you can
refer back to it at a later time.
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With the Set white point eyedropper ( ) selected, hover over the image and press and hold the Alt/Op-
tion key. The image now displays in the posterized view again.
